/*
* Pick a software-based provider and submit a request to seed
* its random number generator.
*/
static void
rngprov_seed(uint8_t *buf, int len, uint_t entropy_est, uint32_t flags)
{
kcf_provider_desc_t *pd = NULL;
if (kcf_get_sw_prov(rngmech_type, &pd, NULL, B_FALSE) ==
CRYPTO_SUCCESS) {
(void) KCF_PROV_SEED_RANDOM(pd, pd->pd_sid, buf, len,
entropy_est, flags, NULL);
KCF_PROV_REFRELE(pd);
}
}
/*
* crypto_create_ctx_template()
*
* Arguments:
*
* mech: crypto_mechanism_t pointer.
* mech_type is a valid value previously returned by
* crypto_mech2id();
* When the mech's parameter is not NULL, its definition depends
* on the standard definition of the mechanism.
* key: pointer to a crypto_key_t structure.
* ptmpl: a storage for the opaque crypto_ctx_template_t, allocated and
* initialized by the software provider this routine is
* dispatched to.
* kmflag: KM_SLEEP/KM_NOSLEEP mem. alloc. flag.
*
* Description:
* Redirects the call to the software provider of the specified
* mechanism. That provider will allocate and pre-compute/pre-expand
* the context template, reusable by later calls to crypto_xxx_init().
* The size and address of that provider context template are stored
* in an internal structure, kcf_ctx_template_t. The address of that
* structure is given back to the caller in *ptmpl.
*
* Context:
* Process or interrupt.
*
* Returns:
* CRYPTO_SUCCESS when the context template is successfully created.
* CRYPTO_HOST_MEMEORY: mem alloc failure
* CRYPTO_ARGUMENTS_BAD: NULL storage for the ctx template.
* RYPTO_MECHANISM_INVALID: invalid mechanism 'mech'.
*/
int
crypto_create_ctx_template(crypto_mechanism_t *mech, crypto_key_t *key,
crypto_ctx_template_t *ptmpl, int kmflag)
{
int error;
kcf_mech_entry_t *me;
kcf_provider_desc_t *pd;
kcf_ctx_template_t *ctx_tmpl;
crypto_mechanism_t prov_mech;
/* A few args validation */
if (ptmpl == NULL)
return (CRYPTO_ARGUMENTS_BAD);
if (mech == NULL)
return (CRYPTO_MECHANISM_INVALID);
error = kcf_get_sw_prov(mech->cm_type, &pd, &me, B_TRUE);
if (error != CRYPTO_SUCCESS)
return (error);
if ((ctx_tmpl = (kcf_ctx_template_t *)kmem_alloc(
sizeof (kcf_ctx_template_t), kmflag)) == NULL) {
KCF_PROV_REFRELE(pd);
return (CRYPTO_HOST_MEMORY);
}
/* Pass a mechtype that the provider understands */
prov_mech.cm_type = KCF_TO_PROV_MECHNUM(pd, mech->cm_type);
prov_mech.cm_param = mech->cm_param;
prov_mech.cm_param_len = mech->cm_param_len;
error = KCF_PROV_CREATE_CTX_TEMPLATE(pd, &prov_mech, key,
&(ctx_tmpl->ct_prov_tmpl), &(ctx_tmpl->ct_size), KCF_RHNDL(kmflag));
if (error == CRYPTO_SUCCESS) {
ctx_tmpl->ct_generation = me->me_gen_swprov;
*ptmpl = ctx_tmpl;
} else {
kmem_free(ctx_tmpl, sizeof (kcf_ctx_template_t));
}
KCF_PROV_REFRELE(pd);
return (error);
}
/*
* crypto_cipher_init_prov()
*
* Arguments:
*
* pd: provider descriptor
* sid: session id
* mech: crypto_mechanism_t pointer.
* mech_type is a valid value previously returned by
* crypto_mech2id();
* When the mech's parameter is not NULL, its definition depends
* on the standard definition of the mechanism.
* key: pointer to a crypto_key_t structure.
* tmpl: a crypto_ctx_template_t, opaque template of a context of an
* encryption or decryption with the 'mech' using 'key'.
* 'tmpl' is created by a previous call to
* crypto_create_ctx_template().
* ctxp: Pointer to a crypto_context_t.
* func: CRYPTO_FG_ENCRYPT or CRYPTO_FG_DECRYPT.
* cr: crypto_call_req_t calling conditions and call back info.
*
* Description:
* This is a common function invoked internally by both
* crypto_encrypt_init() and crypto_decrypt_init().
* Asynchronously submits a request for, or synchronously performs the
* initialization of an encryption or a decryption operation.
* When possible and applicable, will internally use the pre-expanded key
* schedule from the context template, tmpl.
* When complete and successful, 'ctxp' will contain a crypto_context_t
* valid for later calls to encrypt_update() and encrypt_final(), or
* decrypt_update() and decrypt_final().
* The caller should hold a reference on the specified provider
* descriptor before calling this function.
*
* Context:
* Process or interrupt, according to the semantics dictated by the 'cr'.
*
* Returns:
* See comment in the beginning of the file.
*/
static int
crypto_cipher_init_prov(crypto_provider_t provider, crypto_session_id_t sid,
crypto_mechanism_t *mech, crypto_key_t *key,
crypto_spi_ctx_template_t tmpl, crypto_context_t *ctxp,
crypto_call_req_t *crq, crypto_func_group_t func)
{
int error;
crypto_ctx_t *ctx;
kcf_req_params_t params;
kcf_provider_desc_t *pd = provider;
kcf_provider_desc_t *real_provider = pd;
ASSERT(KCF_PROV_REFHELD(pd));
if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
if (func == CRYPTO_FG_ENCRYPT) {
error = kcf_get_hardware_provider(mech->cm_type,
CRYPTO_MECH_INVALID, CHECK_RESTRICT(crq), pd,
&real_provider, CRYPTO_FG_ENCRYPT);
} else {
error = kcf_get_hardware_provider(mech->cm_type,
CRYPTO_MECH_INVALID, CHECK_RESTRICT(crq), pd,
&real_provider, CRYPTO_FG_DECRYPT);
}
if (error != CRYPTO_SUCCESS)
return (error);
}
/* Allocate and initialize the canonical context */
if ((ctx = kcf_new_ctx(crq, real_provider, sid)) == NULL) {
if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
KCF_PROV_REFRELE(real_provider);
return (CRYPTO_HOST_MEMORY);
}
/* The fast path for SW providers. */
if (CHECK_FASTPATH(crq, pd)) {
crypto_mechanism_t lmech;
lmech = *mech;
KCF_SET_PROVIDER_MECHNUM(mech->cm_type, real_provider, &lmech);
if (func == CRYPTO_FG_ENCRYPT)
error = KCF_PROV_ENCRYPT_INIT(real_provider, ctx,
&lmech, key, tmpl, KCF_SWFP_RHNDL(crq));
else {
ASSERT(func == CRYPTO_FG_DECRYPT);
error = KCF_PROV_DECRYPT_INIT(real_provider, ctx,
&lmech, key, tmpl, KCF_SWFP_RHNDL(crq));
}
KCF_PROV_INCRSTATS(pd, error);
goto done;
}
/* Check if context sharing is possible */
if (pd->pd_prov_type == CRYPTO_HW_PROVIDER &&
key->ck_format == CRYPTO_KEY_RAW &&
KCF_CAN_SHARE_OPSTATE(pd, mech->cm_type)) {
kcf_context_t *tctxp = (kcf_context_t *)ctx;
kcf_provider_desc_t *tpd = NULL;
crypto_mech_info_t *sinfo;
if ((kcf_get_sw_prov(mech->cm_type, &tpd, &tctxp->kc_mech,
B_FALSE) == CRYPTO_SUCCESS)) {
int tlen;
sinfo = &(KCF_TO_PROV_MECHINFO(tpd, mech->cm_type));
/*
* key->ck_length from the consumer is always in bits.
* We convert it to be in the same unit registered by
* the provider in order to do a comparison.
*/
if (sinfo->cm_mech_flags & CRYPTO_KEYSIZE_UNIT_IN_BYTES)
tlen = key->ck_length >> 3;
else
